The Combined Risk Index is calculated by normalizing the values of the following columns:
Each column is normalized to a range between 0 and 1, where 0 represents the lowest risk and 1 represents the highest risk. The Combined Risk Index is the average of these normalized values.
Note that for the normalization:
In the Pacific context, these variables are crucial due to their direct impact on communities' vulnerability to natural disasters, accessibility, and overall resilience:
High risk sites are classified as follows:
The percentage of high-risk sites is calculated as the number of high-risk sites divided by the total number of sites.
| Province | Mean Rainfall in Driest Quarter (mm) | Median Rainfall in Driest Quarter (mm) | Std Dev Rainfall in Driest Quarter (mm) | Mean Height above Sea Level (m) | Median Height above Sea Level (m) | Std Dev Height above Sea Level (m) | Mean Height above Drainage Network (m) | Median Height above Drainage Network (m) | Std Dev Height above Drainage Network (m) | High Risk Sites (Rainfall) | High Risk Sites (Height above Sea Level) | High Risk Sites (Height above Drainage Network) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rennell and Bellona | 501 | 500 | 21 | 18 | 13 | 19 | 6 | 5 | 5 | 18 (100.0%) | 6 (33.0%) | 16 (89.0%) |
| Temotu | 326 | 0 | 465 | 13 | 11 | 15 | 10 | 8 | 8 | 36 (67.0%) | 24 (44.0%) | 30 (56.0%) |
| Western | 637 | 719 | 247 | 15 | 10 | 17 | 13 | 10 | 16 | 133 (86.0%) | 73 (47.0%) | 77 (50.0%) |
| Malaita | 560 | 636 | 211 | 62 | 14 | 126 | 28 | 9 | 50 | 343 (100.0%) | 121 (35.0%) | 173 (50.0%) |
| Makira-Ulawa | 638 | 710 | 217 | 17 | 11 | 23 | 13 | 8 | 18 | 120 (100.0%) | 53 (44.0%) | 71 (59.0%) |
| Guadalcanal | 354 | 340 | 70 | 36 | 12 | 73 | 14 | 7 | 29 | 167 (100.0%) | 70 (42.0%) | 100 (60.0%) |
| Isabel | 532 | 525 | 69 | 35 | 11 | 91 | 18 | 7 | 40 | 103 (100.0%) | 46 (45.0%) | 64 (62.0%) |
| Honiara | 289 | 288 | 2 | 23 | 18 | 18 | 12 | 11 | 10 | 47 (100.0%) | 11 (23.0%) | 22 (47.0%) |
| Choiseul | 671 | 736 | 209 | 9 | 7 | 9 | 8 | 6 | 8 | 93 (100.0%) | 63 (68.0%) | 68 (73.0%) |
| Central | 347 | 347 | 1 | 10 | 7 | 9 | 10 | 7 | 9 | 3 (100.0%) | 2 (67.0%) | 2 (67.0%) |
| National | 530 | 625 | 238 | 35 | 12 | 84 | 18 | 8 | 35 | 1063 (96.0%) | 469 (43.0%) | 623 (56.0%) |